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Dr. Thomas Delworth
Dr. Thomas Delworth is leader of the Climate Dynamics and Prediction Group at the
Geophysical Fluid Dynamics Laboratory (GFDL) in Princeton, New Jersey, where he
has been a research scientist since 1984. GFDL is part of the National Oceanic and
Atmospheric Administration, and is one of the world's leading climate modeling centers.
Dr. Delworth's research focuses on climate variability and change on time scales
of decades to centuries, with particular emphasis on decadal variability of the
Atlantic ocean and its impact on climate. Dr. Delworth has served on numerous national
and international scientific research committees, has been a contributing author
for the Intergovernmental Panel on Climate Change, and has authored over 50 papers
for scientific journals and books.

Dr. Don Perovich
Don Perovich received a Ph.D. degree in Geophysics from the University of Washington
in 1983. He is a Research Geophysicist at the Cold Regions Research and Engineering
Laboratory in Hanover NH. His primary research interest is understanding the role
of sea ice in the global climate system, with an emphasis on the heat budget of
sea ice and the ice albedo feedback. He has participated in numerous field experiments
including serving as the Chief Scientist of SHEBA, a large international program
studying the Surface Heat Budget of the Arctic Ocean. The centerpiece of this program
was a year-long ice drift experiment. In 2005 he conducted sea ice studies during
a 2005 Trans Arctic icebreaker expedition to the North Pole.